Avengers vs. X-Men launch parties are to take place at participating retailers, Marvel Comics has announced.

Comics outlets have been asked to choose between the two superhero teams, and will receive exclusive packs containing promotional materials based on their allegiance.

The Avengers vs. X-Men events will kick off at 8pm on April 3, one day before the first issue of the crossover series is scheduled for release.

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"We've never had a bigger story than Avengers vs. X-Men and we're backing retailers with the biggest incentives you've ever seen through the Avengers vs. X-Men launch parties," said Marvel sales executive David Gabriel.

"Whether it's advertising, promotional material or limited edition variant covers, every one of our valued retailer partners will be able to get the word out to both their regular customers and new fans about this comic event and the exciting Avengers vs. X-Men launch parties.

"Some stores will choose to side with the Avengers and some will side with the X-Men, but I can guarantee one thing - Marvel will make sure all of them have everything they need to make Avengers vs. X-Men #1 their top selling comic of the year."